Vehicle spring



C. P. STANBONJ VEHICLE SPRING.

APPLICATION FILED APR, 30. 1919.

1,418,031 Patented y 30, 1922.

Inveuior I oeavlesl! Siawb'on,

unites stares CHARLES 1. STANBON, 0T1 LYNN, MASSACHUSETTS.

VEHICLE SPRING.

Application filed. April 30,

To all QlJ/tmn may (rmmcrn:

Be it known that 1, Clinics P. Srsnnon, a citizen of the United States,and a resident. of Lynn, county oi Essex, and Common wealth ofltlassachusetts, have invented an Improvement in Vehicle Springs,ot'which the "following description, in conn ction with the accompanyingdrawings, a specification, like characters on the drawings representinglike parts.

T his invention relates to vehicle springs and has tor its object toprovide a novel "form of spring particularly adapted for use onautomobiles or any fast moving vehicles.

in the drawings of the embodiment of my invention illustrated anddescribed herein;

Fig. 1, is a side elevation of .my novel spring;

Fig. 2, a plan of the same;

Fig. 3, an end elevation on an enlarged scale; and

Fig. 1, a detail partly in section, on the line 4l-4t, Fig. 2, also onan enlarged scale.

The type of spring illustrated in Fig. 1, is commonly known as the fullelliptic, that is, it comprises two concave convex halves, or sets ofleaves, of similar construction, oppositely positioned and secured attheir ends, as distinguished from the semi or half e liptic type, thatis, either the upper or lower half; and also as distinguished from thethree quarter elliptic type comprising one entire half and a shortenedopposite halt. My invention is equally applicable to either type, and itwill be apparent that the description 013 my invention as embodied inone half spring or one set of leaves will apply to all types mentioned.

illimproved construction, Figs. 1, 2, 4 comprises a master leaf 1, offull length, each end 2. of which is suitably curved to embrace the boltor spindle 3, Fig. 3, and lock the leaf thereto.

This end 2 is toothed at 4, Fig. 3, to engage similar teeth on thecorresponding master leat member 5 of the lower half, thus permittingeach member to have a good locking grip on the spindle 3 and at the sametime to yield slightly relative to the opposite member when the strainsand stresses imposed on it by the weight and movement of the vehiclemake it desirable. I

Superimposed upon the leaf 1 are a plurality of shorter leaves 6, 7, 8,9, 10, 11, 12, 13, each progressively shorter than the preceding one,and each provided near its end Specification. of Letters Patent.

depending lip 1 1, which en Patented May 30, 1922.

1919. Serial N0. 293,799.

and on each side at its lower edge with a ages the upper edges or" thenext lower eat to prevent lateral movement of one relative to the other.

When a vehicle runs over a hump in the road, it is well known that, asthe body of the vehicle goes up into the air the several leaves of eachspring separate in proportion to the resistance encountered.

To prevent the leaves from separating too far with the danger that, whenthe body descends it will break the spring, it has been customary torestrain the separating movement of the leaves within certain limits bymeans of clips secured to the under face of the inner leaf and embracingtwo or more of the leaves above it.

In order to'use these clips it has been necessary to use full convexsprings, that is, convex throughout their length as distinguished from aconvex-concave spring such as shown in Fig. 1, in order to avoid thedanger of the clips on the lower half striking the clips on the upperhalf: of the spring when the spring is under pressure or compressed.

Or if the clips should not strike, and the inner leaf 1 of the upperhalf should be compressed until it rested upon a clip on the inner leaf5 of the lower half, the upper leaf would undoubtedly break because thestrain would be unequally concentrated on that particular point as afulcrum instead of at the end of the spring.

While a convex-concave spring such as shown in Fig. 1, is much moreflexible and yielding than a full convex spring it has been impossibleto use it for anything more than the very lightest work because there isnot sufficient clearance between the upper and lower sets oi"? leaves touse the clips for locking the leaves of each set together.

In order to permit the use of this most flexible form of spring,convex-concave, I have conceived the novel idea of providing an unlockedor movable anchored master leaf 15 of such length that it may overliethe shortest leaf in the set and of movably anchoring it in such mannerthat it will permit a reasonable play of the several leaves beneath it,but restrain them against undue lay or undue vertical separation.

To that end the leaf 15 in each case is shown as extended so that itsends underlie and are movably anchored to the pins 16, and are upturnedat 1-7 to limit the upward movement of it and prevent the leaf fromspringing upward too far and away from the others. when released fromtension,. or when going over a hump.

The upturned ends 17 slightly from the ends 2 of the leaf 1 to providefor the necessary endwise play thereof.

It Will be obvious that by this construction the full advantage of thegreater flexibility of the convex-concave spring can be obtained withoutthe danger of breaking it under the conditions named. It will be notedthat the master leaves 1 5, of the spring are very flexible and almosttouch in normal position.

hen the weight is imposed upon the spring the long master leaves 1,flexv to substantially thedot'ted line position F 1, and almost or quitemeet, and in some cases With a smooth bearing one upon the other fromthe bolts 3 inwardly, and which would not be the case it clips wereused. The free length of the leaves and therefore the working or flexinglength obviously diminishes as they close up and meet under pressure,thus reducing very materially the dan ger of breakage by transferringthe load progressively to an increasing number of leaves.

Obviously my invention is not limited in all details to the foregoingdescribed. and illustrated embodment, andI claim:

1. A full elliptic spring comprising a plurality of master leavesmovably anchored to oppositely positioned spindles and 0pare separated 1posed longer leaves individually immovably anchored to a common thirdspindle.

2. A full elliptic clipless spring comprising master leaves movablyanchored, and opposite longer master leaves individually immovablyanchored and interlocked at their ends to a common third spindle.

3. A full elliptic spring comprising master leaves movably anchored,opposed longer master leaves each relatively immovably anchored and atriangular anchorage for the leaves but jointly movable.

4. A full elliptic spring comprising mastor leaves movably anchoredopposed longer master leaves each relatively immovably but jointly mo/ably anchored. former master leaves to a joint anchorage.

5. A. full elliptic spring comprising an anchorage master leaves movablyanchored theij'eto and master leaves individually relatively immovablybut jointly movable anchored thereto in different planes and interlockedone with the other upon a separate spindle.

6.2111 elliptic spring comprising inner and outer master leaves. leavesor". varying length between them with leaf positioning ears thereon, theouter master leaves movably locked to one common set of anchorages theinner master leaves individually immovably lockedto a different set ofanchorages and interlocked with each other.

In testimony whereof, I have signed my name to this specification.

CHARLES P. STANBON.

and between the

